{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{8}{c}}
\toprule
                    &\multicolumn{2}{c}{\emph{E. coli} present}&\multicolumn{2}{c}{TC present} &\multicolumn{2}{c}{\emph{E. coli} (MPN)}&\multicolumn{2}{c}{TC (MPN)}   \\
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   &\multicolumn{1}{c}{(5)}   &\multicolumn{1}{c}{(6)}   &\multicolumn{1}{c}{(7)}   &\multicolumn{1}{c}{(8)}   \\
\midrule
Training            &       -0.19** &               &       -0.40***&               &       -0.88** &               &       -2.50***&               \\
                    &      (0.08)   &               &      (0.13)   &               &      (0.42)   &               &      (0.68)   &               \\
Training + supplies &       -0.12   &               &       -0.21   &               &       -0.73*  &               &       -2.07***&               \\
                    &      (0.10)   &               &      (0.13)   &               &      (0.43)   &               &      (0.69)   &               \\
Training, any       &               &       -0.16*  &               &       -0.31***&               &       -0.81*  &               &       -2.30***\\
                    &               &      (0.08)   &               &      (0.11)   &               &      (0.42)   &               &      (0.66)   \\
\midrule
T vs T $+$ S: $ p $ value&       0.161   &               &       0.165   &               &       0.177   &               &       0.270   &               \\
Control mean        &        0.19   &        0.19   &        0.77   &        0.77   &        0.88   &        0.88   &        3.42   &        3.42   \\
\bottomrule
\end{tabular}
}
